Calculate the change in internal energy of the system if 15 kJ of work done on the surrounding and system releases 10 kJ of heat in a particular reaction.
15 kJ
10 kJ
-25 kJ
-15 kJ
Which from following units of concentrations of solutions is temperature independent?
Molarity
Mole fraction
Percent by volume
Mass by volume
Which of the following is a pair of dihydric phenols?
Resorcinol and pyrogallol
Quinol and phloroglucinol
Phloroglucinol and pyrogallol
Catechol and quinol
Identify the products of following reaction.
$$ \mathrm{C}_6 \mathrm{H}_5 \mathrm{COOC}_2 \mathrm{H}_5 \xrightarrow[\text { dil H}_2 \mathrm{SO}_4]{\Delta} \text { Products } $$
$\mathrm{C}_6 \mathrm{H}_5 \mathrm{OH}+\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$
$\mathrm{C}_6 \mathrm{H}_5 \mathrm{OH}+\mathrm{C}_2 \mathrm{H}_5 \mathrm{COOH}$
$\mathrm{C}_6 \mathrm{H}_5 \mathrm{COOH}+\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$
$\mathrm{C}_6 \mathrm{H}_5 \mathrm{COOH}+\mathrm{C}_2 \mathrm{H}_5 \mathrm{COOH}$
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